The ORDER BY clause is used with the SELECT statement. Here the records of the table are sorted by the column ascending (ASC) and descending (DESC) order.
Note: If ASC or DESC keyword is not used then ASC default is set.
SELECT column_name(s) FROM table_name ORDER BY column_name(s) ASC|DESC
Example for Sorting Records with ORDER BY clause using MySQLi
<?php
$conn = mysqli_connect("localhost", "root", "", "expertstutorials");
if($conn){
echo "Connected successfully.<br />";
}
else{
echo "Connection failed : ".mysqli_connect_error();
}
$select = "SELECT * FROM course ORDER BY id ASC";
$result = mysqli_query($conn, $select);
echo "<table>
<tr>
<th>id</th>
<th>Course Name</th>
<th>Course Year</th>
</tr>";
if(mysqli_num_rows($result) > 0){
while($rows = mysqli_fetch_assoc($result)){
echo "<tr>
<td>".$rows['id']."</td>
<td>".$rows['course_name']."</td>
<td>".$rows['course_year']."</td>
</tr>";
}
echo "</table>";
}
else{
echo "rows not found in table";
}
mysqli_close($conn);
?>
Example for Sorting Records with ORDER BY clause using PDO
<?php
$server = "localhost";
$user = "root";
$password = "";
$db = "expertstutorials";
try{
$conn = new PDO("mysql:host=$server;dbname=$db", $user, $password);
echo "Connected successfully.";
$select = "SELECT * FROM course ORDER BY id ASC";
$result = $conn->query($select);
echo "<table>
<tr>
<th>id</th>
<th>Course Name</th>
<th>Course Year</th>
</tr>";
if($result->rowCount() > 0){
while($rows = $result->fetch()){
echo "<tr>
<td>".$rows['id']."</td>
<td>".$rows['course_name']."</td>
<td>".$rows['course_year']."</td>
</tr>";
}
echo "</table>"; 
}
else{
echo "rows not found in table";
}
} 
catch(PDOException $e){
echo "Table Creation failed : " . $e->getMessage();
}
$conn = null;
?>